code. compile. run. debug. share.
Source Code
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#include <iostream>
#include <cassert>
#include <algorithm>
#include <vector>
using float64 = float;
void Sort(std::vector<float64>& points) {
assert(points.size() % 3 == 0);
struct Point {
float64 X, Y, Z;
};
auto begin = static_cast<Point*>(static_cast<void*>(points.data()));
auto end = begin + points.size() / 3;
std::sort(begin, end, [](const Point& ptLeft, const Point& ptRight){
return ptLeft.Z < ptRight.Z;
});
}
void printCoords (const std::vector<float64>& coords){
for(auto it = coords.begin(); it != coords.end();) {
for(int i = 0; i < 3; ++i) {
std::cout << " X=" << *it++;
std::cout << " Y=" << *it++;
std::cout << " Z=" << *it++;
std::cout << std::endl;
}
}
}
int main()
{
std::vector<float64> coords;
coords.insert(coords.end(), { 0.0F, 0.0F,0.0F});
coords.insert(coords.end(), { -1.0F, -1.0F, -1.0F});
coords.insert(coords.end(), { 1.0F, 1.0F, 1.0F});
std::cout << "Before sort\n";
printCoords(coords);
Sort(coords);
std::cout << "After sort\n";
printCoords(coords);
}
Compiling Program...
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